Hi @DaveP4567, welcome to the Sonos Community!
We do support using Amazon Alexa devices like the Echo or Echo dot to control Sonos, though I’m not sure if this also works with the Fire TV Cube: You’ll have to reach out to Amazon for confirmation regarding this.
Our support article for connecting an Amazon Alexa device to Sonos provides the steps on how to do this. Please note that while you can control Sonos with your voice this way, you can still only group Sonos speakers with other Sonos speakers for multiroom playback.
I hope this information helps.
